# P0604 on the 2023 Jeep Wagoneer

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0604

- [11030253](https://open.wenmarpro.com/bulletins/11030253), 2026-03-25: Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P0111\-00 \- Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. \(In Active or Stored status\) ● P0071\-00 \- Ambient Air Temperature Sensor Performance. \(In Active or Stored status\) ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low. \(In Active or Stored status\) ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High. \(In Active or Stored status\) ● P0011\-00 \- Bank 1 Camshaft 1 Position Timing Over Advanced Or. \(In Active or Stored status\) ● P25E4\-00 \- B Camshaft Position \- Unable To Achieve Locked Position Bank 1. \(In Active or Stored status\) ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/stuck Off. \(In Active or Stored status\) ● P05BD\-00 \- Stop\-Start Mode Switch Range/Performance. \(In Active or Stored status\) ● P0116\-00 \- Engine Coolant Temperature Sensor 1 Performance. \(In Active or Stored status\) ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance. \(In Active or Stored status\) ● P018B\-00 \- Fuel Pressure Sensor "B" Circuit Range/Performance. \(In Active or Stored status\)\*\* ● U0104\-00 \- Lost Communication With Cruise Control Module. \(NA Market Only\)\*\*\(In Active or Stored status\)\*\* ● U0405\-00 \- Invalid Data Received From Cruise Control Module. \(NA Market Only\)\*\*\(In Active or Stored status\)\*\* ● P018B\-00 \- Fuel Pressure Sensor "B" Circuit Range/Performance. \*\*\(In Active or Stored status\)\*\* ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking Bank 1. \*\*\(In Active or Stored status\)\*\* ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off. \*\*\(In Active or Stored status\)\*\* ● P0461\-00 \- Fuel Level Sensor "A" Circuit Range/Performance. \*\*\(In Active or Stored status\)\*\* ● P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected. \*\*\(In Active or Stored status\)\*\* ● P0604
- [11030251](https://open.wenmarpro.com/bulletins/11030251), 2026-03-25: Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P0111\-00 \- Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1 \(In Active or Stored status\). ● P0071\-00 \- Ambient Air Temperature Sensor Performance \(In Active or Stored status\). ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low \(In Active or Stored status\). ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High \(In Active or Stored status\). ● P0011\-00 \- Bank 1 Camshaft 1 Position Timing Over Advanced Or \(In Active or Stored status\). ● P25E4\-00 \- B Camshaft Position \- Unable To Achieve Locked Position Bank 1 \(In Active or Stored status\). ● U0673\-00 \- Lost Communication With Ion Sense Module \(In Active or Stored status\). ● P05BD\-00 \- Stop\-Start Mode Switch Range/Performance \(In Active or Stored status\). ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/stuck Off \(In Active or Stored status\). ● P0116\-00 \- Engine Coolant Temperature Sensor 1 Performance \(In Active or Stored status\). ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking \(In Active or Stored status\). ● P0325\-00 \- Knock/Combustion Vibration Sensor 1 Circuit \(In Active or Stored status\). ● P0330\-00 \- Knock/Combustion Vibration Sensor 2 Circuit \(In Active or Stored status\). ● P032A\-00 \- Knock \- Combustion Vibration Sensor C Circuit \(In Active or Stored status\). ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance \(In Active or Stored status\). ● P018B\-00 \- Fuel Pressure Sensor "B" Circuit Range/Performance \(In Active or Stored status\). ● P00F3\-00 \- Humidity Sensor Circuit Range \- Performance \(In Active or Stored status\). ● P0604\-00 \- Internal Control Module Random Access Memory RAM Error \(In Active or Stored status\). ● P060C\-00 \- Internal Control Module Main Processor Performance \(In Active or Stored status\). ● P0300 \- Mul
- [11030229](https://open.wenmarpro.com/bulletins/11030229), 2026-03-25: Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P0111\-00 \- Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. \(In Active or Stored status\) ● P0071\-00 \- Ambient Air Temperature Sensor Performance. \(In Active or Stored status\) ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low. \(In Active or Stored status\) ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High. \(In Active or Stored status\) ● P0011\-00 \- Bank 1 Camshaft 1 Position Timing Over Advanced Or. \(In Active or Stored status\) ● P25E4\-00 \- B Camshaft Position \- Unable To Achieve Locked Position Bank 1. \(In Active or Stored status\) ● P05BD\-00 \- Stop\-Start Mode Switch Range/Performance. \(In Active or Stored status\) ● P0116\-00 \- Engine Coolant Temperature Sensor 1 Performance. \(In Active or Stored status\) ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance. \(In Active or Stored status\) ● P0604\-00 \- Internal Control Module Random Access Memory Ram Error. \(In Active or Stored status\) ● P060C\-00 \- Internal Control Module Main Processor Performance. \(In Active or Stored status\)\*\* ● P018B\-00 \- Fuel Pressure Sensor "B" Circuit Range/performance. \*\*\(In Active or Stored status\)\*\* ● P1CEA\-00 \- Boost Side EVAP Purge System Performance. \*\*\(In Active or Stored status\)\*\* ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off. \*\*\(In Active or Stored status\)\*\* ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking. \*\*\(In Active or Stored status\)\*\* ● P0300\-00 \- Multiple Cylinder Misfire. \*\*\(In Active or Stored status\)\*\* Customers may also experience one or more of the following: ● \*\*Oil Level High Warning in the Instrument Panel Cluster \(IPC\).\*\* ● Fully Autonomous Parking Assist \(FAPA\) is not deactivated when accelerator pedal is pressed. ● Vehicle is not heating up fast enough at freezi
- [11030228](https://open.wenmarpro.com/bulletins/11030228), 2026-03-25: Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P0111\-00 \- Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. \(In Active or Stored status\) ● P0071\-00 \- Ambient Air Temperature Sensor Performance. \(In Active or Stored status\) ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low. \(In Active or Stored status\) ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High. \(In Active or Stored status\) ● P0011\-00 \- Bank 1 Camshaft 1 Position Timing Over Advanced Or. \(In Active or Stored status\) ● P25E4\-00 \- B Camshaft Position \- Unable To Achieve Locked Position Bank 1. \(In Active or Stored status\) ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/stuck Off. \(In Active or Stored status\) ● P05BD\-00 \- Stop\-Start Mode Switch Range/Performance. \(In Active or Stored status\) ● P0116\-00 \- Engine Coolant Temperature Sensor 1 Performance. \(In Active or Stored status\) ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance. \(In Active or Stored status\) ● P018B\-00 \- Fuel Pressure Sensor "B" Circuit Range/Performance. \(In Active or Stored status\)\*\* ● U0104\-00 \- Lost Communication With Cruise Control Module. \(NA Market Only\)\*\*\(In Active or Stored status\)\*\* ● U0405\-00 \- Invalid Data Received From Cruise Control Module. \(NA Market Only\)\*\*\(In Active or Stored status\)\*\* ● P018B\-00 \- Fuel Pressure Sensor "B" Circuit Range/Performance. \*\*\(In Active or Stored status\)\*\* ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking Bank 1. \*\*\(In Active or Stored status\)\*\* ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off. \*\*\(In Active or Stored status\)\*\* ● P0461\-00 \- Fuel Level Sensor "A" Circuit Range/Performance. \*\*\(In Active or Stored status\)\*\* ● P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected. \*\*\(In Active or Stored status\)\*\* ● P0604
- [11030226](https://open.wenmarpro.com/bulletins/11030226), 2026-03-25: Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P0111\-00 \- Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1 \(In Active or Stored status\). ● P0071\-00 \- Ambient Air Temperature Sensor Performance \(In Active or Stored status\). ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low \(In Active or Stored status\). ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High \(In Active or Stored status\). ● P0011\-00 \- Bank 1 Camshaft 1 Position Timing Over Advanced Or \(In Active or Stored status\). ● P25E4\-00 \- B Camshaft Position \- Unable To Achieve Locked Position Bank 1 \(In Active or Stored status\). ● U0673\-00 \- Lost Communication With Ion Sense Module \(In Active or Stored status\). ● P05BD\-00 \- Stop\-Start Mode Switch Range/Performance \(In Active or Stored status\). ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/stuck Off \(In Active or Stored status\). ● P0116\-00 \- Engine Coolant Temperature Sensor 1 Performance \(In Active or Stored status\). ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking \(In Active or Stored status\). ● P0325\-00 \- Knock/Combustion Vibration Sensor 1 Circuit \(In Active or Stored status\). ● P0330\-00 \- Knock/Combustion Vibration Sensor 2 Circuit \(In Active or Stored status\). ● P032A\-00 \- Knock \- Combustion Vibration Sensor C Circuit \(In Active or Stored status\). ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance \(In Active or Stored status\). ● P018B\-00 \- Fuel Pressure Sensor "B" Circuit Range/Performance \(In Active or Stored status\). ● P00F3\-00 \- Humidity Sensor Circuit Range \- Performance \(In Active or Stored status\). ● P0604\-00 \- Internal Control Module Random Access Memory RAM Error \(In Active or Stored status\). ● P060C\-00 \- Internal Control Module Main Processor Performance \(In Active or Stored status\). ● P0300 \- Mul
- [11021837](https://open.wenmarpro.com/bulletins/11021837), 2025-08-13: Flash: Powertrain Control Module \(PCM\) Updates \*\*Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\):\*\* ● \*\*U0104\-00 \- Lost Communication With Cruise Control Module. \(NA Market Only\) ● U0405\-00 \- Invalid Data Received From Cruise Control Module. \(NA Market Only\)\*\* ● P018B \- Fuel Pressure Sensor "B" Circuit Range/Performance. ● P00C6 \- Fuel Rail Pressure Too Low \- Engine Cranking Bank 1. ● P06DD \- Engine Oil Pressure Control Circuit Performance/Stuck Off. ● P0461 \- Fuel Level Sensor "A" Circuit Range/Performance. ● P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected. ● P0604\-00 \- Internal Control Module Random Access Memory Ram Error. ● P060C\-00 \- Internal Control Module Main Processor Performance. Customer may also experience one or more of the following: ● Undesirable vehicle drivability behavior causing a Shift to Park event during Engine Stop Start \(ESS\) while Adaptive Cruise Control \(ACC\) is active. ● Pressing the ACC button while ESS is active can shift the vehicle to park. ● Idle speed oscillations observed when in "Snow" and "Mud" modes. ● Poor engine performance \(undershoots engine speed\) for ESS and for non\-ESS engine start. ● Screen two incorrectly pops up on the Instrument Cluster Panel \(IPC\) for five seconds during "Terrain" and "Rock" mode. ● Poor or reduced Air Conditioning \(A/C\) performance during wide open throttle or heavy acceleration. \*\*In addition, the following software enhancement is available: ● Software update to prevent false DTC detection of U0104\-00, U0405\-00 and P018B. \(NA Market Only\)\* This bulletin involves reprogramming the PCM with the latest available software.
- [11021836](https://open.wenmarpro.com/bulletins/11021836), 2025-08-13: Flash: Powertrain Control Module \(PCM\) Updates \*\*Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\):\*\* ● \*\*U0104\-00 \- Lost Communication With Cruise Control Module. \(NA Market Only\) ● U0405\-00 \- Invalid Data Received From Cruise Control Module. \(NA Market Only\)\*\* ● P018B \- Fuel Pressure Sensor "B" Circuit Range/Performance. ● P00C6 \- Fuel Rail Pressure Too Low \- Engine Cranking Bank 1. ● P06DD \- Engine Oil Pressure Control Circuit Performance/Stuck Off. ● P0461 \- Fuel Level Sensor "A" Circuit Range/Performance. ● P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected. ● P0604\-00 \- Internal Control Module Random Access Memory Ram Error. ● P060C\-00 \- Internal Control Module Main Processor Performance. Customer may also experience one or more of the following: ● Undesirable vehicle drivability behavior causing a Shift to Park event during Engine Stop Start \(ESS\) while Adaptive Cruise Control \(ACC\) is active. ● Pressing the ACC button while ESS is active can shift the vehicle to park. ● Idle speed oscillations observed when in "Snow" and "Mud" modes. ● Poor engine performance \(undershoots engine speed\) for ESS and for non\-ESS engine start. ● Screen two incorrectly pops up on the Instrument Cluster Panel \(IPC\) for five seconds during "Terrain" and "Rock" mode. ● Poor or reduced Air Conditioning \(A/C\) performance during wide open throttle or heavy acceleration. \*\*In addition, the following software enhancement is available: ● Software update to prevent false DTC detection of U0104\-00, U0405\-00 and P018B. \(NA Market Only\)\* This bulletin involves reprogramming the PCM with the latest available software.
- [11006243](https://open.wenmarpro.com/bulletins/11006243), 2024-08-13: "Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: ● \*\*P00F3\-00 \- Humidity Sensor Circuit Range\-performance.\*\* ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking. ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off. ● P0461\-00 \- Fuel Level Sensor ""A"" Circuit Range/Performance. ● P051B\-00 \- Crankcase Pressure Sensor Circuit Range/Performance. ● P2F64\-00 \- Ion Sense Feedback Circuit A. ● P0331\-00 \- Knock Sensor 2 Circuit Range/Performance. ● P0300\-00 \- Multiple Cylinder Misfire. ● P2C90\-00 \- Crankcase Ventilation System \- Hose ""A"" Disconnected. ● P0011\-00 \- Bank 1 Camshaft 1 Position Timing Over Advanced Or System Performance. ● P0604\-00 \- Internal Control Module Random Access Memory Ram Error. ● P060C\-00 \- Internal Control Module Main Processor Performance. \*\*Customers may also comment on the following: ● Undesirable vehicle drivability behavior causing the a Shift to Park event during Engine Stop Start \(ESS\) while Adaptive Cruise Control \(ACC\) is active. ● Pressing ACC button while ESS active can shift the vehicle to park. ● Idle speed oscillations observed when in Snow and Mud modes. ● Poor engine performance \(undershoots engine speed\) for ESS and for non\-ESS engine start. ● Screen two incorrectly pops up on the Instrument Cluster Panel \(IPC\) for 5 seconds during Terrain and Rock mode. ● Vehicle performance complaints when coasting at lower speeds.\*\* This bulletin involves reprogramming the PCM with the latest available software."
- [10251853](https://open.wenmarpro.com/bulletins/10251853), 2024-03-18: Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: ? \*\*P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking. ? P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off. ? P0461\-00 \- Fuel Level Sensor "A" Circuit Range/Performance. ? P051B\-00 \- Crankcase Pressure Sensor Circuit Range/Performance. ? P2F64\-00 \- Ion Sense Feedback Circuit A. ? P0331\-00 \- Knock Sensor 2 Circuit Range/Performance. ? P0300\-00 \- Multiple Cylinder Misfire.\*\* ? P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected. ? P0011\-00 \- Bank 1 Camshaft 1 Position Timing Over Advanced Or System Performance. ? P0604\-00 \- Internal Control Module Random Access Memory Ram Error. ? P060C\-00 \- Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software.
- [10251852](https://open.wenmarpro.com/bulletins/10251852), 2024-03-18: Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: ? \*\*P00C6 \- Fuel Rail Pressure Too Low \- Engine Cranking Bank 1. ? P06DD \- Engine Oil Pressure Control Circuit Performance/Stuck Off. ? P0461 \- Fuel Level Sensor "A" Circuit Range/Performance.\*\* ? P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected. ? P0604\-00 \- Internal Control Module Random Access Memory Ram Error. ? P060C\-00 \- Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software.